High performance tandem organic solar cells via a strongly infrared-absorbing narrow bandgap acceptor

Jia Z, Qin S, Meng L, Ma Q, Angunawela I, Zhang J, Li X, He Y, Lai W, Li N, Ade H, Brabec C, Li Y (2021)

Publication Type: Journal article

Publication year: 2021

Journal

Nature Communications Nature Publishing Group: Nature Communications

Book Volume: 12

Article Number: 178

Journal Issue: 1

DOI: 10.1038/s41467-020-20431-6

Abstract

Tandem organic solar cells are based on the device structure monolithically connecting two solar cells to broaden overall absorption spectrum and utilize the photon energy more efficiently. Herein, we demonstrate a simple strategy of inserting a double bond between the central core and end groups of the small molecule acceptor Y6 to extend its conjugation length and absorption range. As a result, a new narrow bandgap acceptor BTPV-4F was synthesized with an optical bandgap of 1.21 eV. The single-junction devices based on BTPV-4F as acceptor achieved a power conversion efficiency of over 13.4% with a high short-circuit current density of 28.9 mA cm−2. With adopting BTPV-4F as the rear cell acceptor material, the resulting tandem devices reached a high power conversion efficiency of over 16.4% with good photostability. The results indicate that BTPV-4F is an efficient infrared-absorbing narrow bandgap acceptor and has great potential to be applied into tandem organic solar cells.

Authors with CRIS profile

Yakun He Institute Materials for Electronics and Energy Technology (i-MEET) Ning Li Institute Materials for Electronics and Energy Technology (i-MEET) Christoph Brabec Institute Materials for Electronics and Energy Technology (i-MEET)

Involved external institutions

Chinese Academy of Sciences (CAS) / 中国科学院 CN China (CN) North Carolina State University US United States (USA) (US)

How to cite

APA:

Jia, Z., Qin, S., Meng, L., Ma, Q., Angunawela, I., Zhang, J.,... Li, Y. (2021). High performance tandem organic solar cells via a strongly infrared-absorbing narrow bandgap acceptor. Nature Communications, 12(1). https://doi.org/10.1038/s41467-020-20431-6

MLA:

Jia, Zhenrong, et al. "High performance tandem organic solar cells via a strongly infrared-absorbing narrow bandgap acceptor." Nature Communications 12.1 (2021).

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